Updated: January 25, 2026

What Is Silenor? Uses, Dosage, and What You Need to Know in 2026

Author

Peter Daggett

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What Is Silenor Used For?
What Is Doxepin? How Is It Related to Silenor?
How Is Silenor Different from Other Sleep Medications?
Silenor Dosage: How to Take It
Who Should NOT Take Silenor?
How Much Does Silenor Cost in 2026?
How to Get a Silenor Prescription

Silenor (doxepin) is an FDA-approved sleep medication for adults who have trouble staying asleep. Here's everything you need to know about how it works, dosing, and who it's for.

Silenor is a brand-name prescription sleep medication that contains doxepin — a compound with a long history in medicine that's been repurposed at very low doses for insomnia. If you've been prescribed Silenor or are curious whether it might help your sleep problems, this guide covers everything you need to know.

What Is Silenor Used For?

Silenor is FDA-approved for the treatment of insomnia characterized by difficulties with sleep maintenance in adults. In plain English: it's specifically for people who wake up in the middle of the night or too early in the morning and can't get back to sleep.

It is not specifically indicated for sleep onset problems (trouble falling asleep in the first place). If your main issue is lying awake for hours before falling asleep, Silenor may not be the best fit — other medications like ramelteon or Z-drugs may be more appropriate.

Doxepin is the generic name for the active ingredient in Silenor. Doxepin has been FDA-approved since 1969 as a tricyclic antidepressant for depression and anxiety at doses of 75–300 mg/day. At the much lower doses in Silenor (3 mg and 6 mg), it works through a completely different mechanism — selectively blocking histamine H1 receptors to promote sleep maintenance.

Silenor was developed by Somaxon Pharmaceuticals and FDA-approved in March 2010. It is now manufactured by Currax Pharmaceuticals. Generic versions of low-dose doxepin tablets became available in 2020.

How Is Silenor Different from Other Sleep Medications?

Silenor stands out from most sleep aids in several important ways:

Not a controlled substance: Unlike zolpidem (Ambien), eszopiclone (Lunesta), suvorexant (Belsomra), and other sleep aids, Silenor is not a DEA Schedule IV drug. This means no refill limits, no special prescribing requirements, and it can be prescribed via telehealth.

No dependence or addiction risk: Clinical studies found no rebound insomnia or withdrawal symptoms when Silenor was stopped after 3 months of nightly use.

Specifically targets sleep maintenance: Silenor was designed to help people stay asleep longer, not to make them fall asleep faster. Clinical trials showed an increase of 25–57 minutes of total sleep time compared to placebo.

Minimal anticholinergic effects at low dose: At 3–6 mg, the dry mouth, constipation, and cognitive effects associated with tricyclic antidepressants are absent.

Silenor Dosage: How to Take It

Adults: 6 mg once daily, taken within 30 minutes of bedtime

Older adults (65+): 3 mg once daily; may be increased to 6 mg if needed and tolerated

Maximum dose: 6 mg/day — do not exceed this

Timing: Do NOT take within 3 hours of eating a meal — food significantly increases absorption and prolongs effects, increasing next-day drowsiness risk

Who Should NOT Take Silenor?

Patients taking MAOIs (monoamine oxidase inhibitors) or who have used them within the past 2 weeks — absolute contraindication

Patients with untreated narrow-angle glaucoma

Patients with severe urinary retention

Patients under 12 years of age (safety not established)

Patients with known hypersensitivity to doxepin or any inactive ingredient in the tablet

How Much Does Silenor Cost in 2026?

Brand Silenor: $500–$650/month at retail without insurance

Generic doxepin 3 mg or 6 mg tablets: About $43–$46/month with GoodRx; covered as Tier 1 on most insurance plans

With insurance: Generic doxepin copay $0–$30 on most plans; brand Silenor typically requires prior authorization and has higher copays

How to Get a Silenor Prescription

Silenor requires a prescription from a licensed healthcare provider. Any doctor, nurse practitioner, or physician assistant can prescribe it — including via telehealth. Once you have a prescription, you can fill it at most pharmacies that stock generic doxepin.

If your pharmacy doesn't have it in stock, medfinder can contact pharmacies near you to find which ones have it available.

Want to understand how Silenor actually works? See: How Does Silenor Work? Mechanism of Action Explained in Plain English.

Frequently Asked Questions

Silenor (doxepin 3 mg and 6 mg tablets) is FDA-approved for adults with insomnia characterized by difficulty staying asleep (sleep maintenance insomnia). It helps people sleep longer through the night with fewer nighttime awakenings. It is not indicated primarily for trouble falling asleep.

Yes. Silenor is the brand name for low-dose doxepin tablets (3 mg and 6 mg) approved for insomnia. Generic doxepin at these same strengths is the same medication and therapeutically equivalent. Doxepin is also available in higher doses (10 mg and above) for depression and anxiety under different brand names.

No. Silenor is not a controlled substance and has no dependence or addiction potential. Clinical studies of up to 3 months found no rebound insomnia, withdrawal symptoms, or tolerance development when patients stopped taking Silenor. This is a key advantage over Schedule IV sleep medications like zolpidem and eszopiclone.

Most patients begin experiencing improved sleep within the first few days of treatment. The FDA recommends evaluating effectiveness after 7–10 days. If sleep problems do not improve within this period, contact your doctor, as this may indicate an underlying medical or psychiatric condition.

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